Recursive Types

Recursive types in TypeScript are a way to define a type that references itself. Recursive types are used to define complex data structures, such as trees or linked lists, where a value can contain one or more values of the same type.

For example, the following is a recursive type that represents a linked list:

type LinkedList<T> = {
  value: T;
  next: LinkedList<T> | null;

let list: LinkedList<number> = {
  value: 1,
  next: { value: 2, next: { value: 3, next: null } },

In this example, the LinkedList type is defined as a type that extends T and contains a property next of the same type LinkedList<T>. This allows us to create a linked list where each node contains a value of type T and a reference to the next node in the list.